Biology - Online Test
Q1. In which of the following places, succession will occur in short time
Answer : Option B
Explaination / Solution:
Succession will occur in short time in heavily overgrazed pasture. If organic compound are already available in the place new organisms will develops faster as compare to bare land without organic matter.
Q2. Aging will be characterised by :
Answer : Option B
Explaination / Solution:
Aging will be characterized by decreased muscle size and increased muscle fat. With aging muscle loose its contractile and elasticity nature. Fats are deposited in muscle fibres the further decrease contracting ability.
Q3. Some ethical standards are required to
Answer : Option D
Explaination / Solution:
The manipulation of living organisms by the human race cannot go on any further, without regulation. Some ethical standards are required to evaluate the morality of all human activities that might help or harm living organisms.
Going beyond the morality of such issues, the biological significance of such things is also important. Genetic modification of organisms can have unpredicatable results when such organisms are introduced into the ecosystem.
Q4. The most important step to overcome the problem of population explosion is to
Answer : Option D
Explaination / Solution:
The problem of population explosion can be overcome by motivating smaller families by using contraceptive methods.
Q5. Blood plasma is pale yellow in colour due to
Answer : Option C
Explaination / Solution:
Blood plasma is pale yellow in colour due to presence of bilirubin pigment in it. Blood appear red due to presence of hemoglobin in RBC.
Q6. The plant cells differ from animal cells in
Answer : Option D
Explaination / Solution:
The plant cells have an eukaryotic structure with prominent chloroplasts and cell wall mainly made of cellulose.
Q7. The system of adjacent cell walls that is continuous throughout the plant is called as
Answer : Option C
Explaination / Solution:
The apoplastis the system of adjacent cell walls that iscontinuousthroughout the plant, except at the casparianstrips of the endodermis in the roots. The apoplastic movement of water occurs exclusively through the intercellular spaces and the walls of the cells.
Q8. The correct order of stages of embryogeny in dicotyledonous embryo is
Answer : Option C
Explaination / Solution:
Embryogeny in dicotyledonous plants involves mitotic division of zygote to form proembryo, further division in proembryo results into globular embryo followed by heart-shaped embryo to mature embryo.
Q9. A statement 933 females per 1000 males depict
Answer : Option C
Explaination / Solution:
Sex ration is the no of female available per thousands of male in a population. Sex ratio is decline due to female feticides alarmingly in some part of India.
Q10. Which one is not a element deficiency symptoms
Answer : Option D
Explaination / Solution:
Deficiency of elements in plants manifest as symptoms like chlorosis, necrosis, scorched leaf tips etc. smaller fruit size is not a deficiency symptoms.
